The rumor mill has begun to churn thanks to a Tweet by "Hobby Drifter" on Twitter (embedded below). Some leaked art appears to show a "Combiner Wars" Liokaiser! Popular among fans as a Combiner they have wanted for years (but often had to pay heavy duty cash to obtain), folks have speculated about a Combiner Wars Liokaiser since the line began. If this mock up is real it looks like it takes Aerialbots and two uses of the Brawl sculpt to help make up the giant.
Remember, this is not official confirmation, just rumor for now.